For all those Leverkusen folk, Sunday will mark the end to a mammoth season which began on 3 August - 11 months ago - when the club beat Hansa Rostock 3-0 in heavy rain as the Bundesliga campaign kicked off.
Five days later Leverkusen travelled to Yugoslavia to play Red Star Belgrade in a third round qualifying tie as they began their remarkable European adventure which took them all the way to the Champions League final.
Leverkusen ultimately failed to win Europe's most prestigious competition, thwarted by Real Madrid and Zinedine Zidane's sublimely executed volley.
As they had failed four days earlier to win the German Cup final after being beaten 4-2 by Schalke.
A week before that, Leverkusen had let slip their first chance of silverware after they were pipped to the Bundesliga title by Borussia Dortmund on the last day of the season.
That was the most painful loss. Klaus Toppmoeller's side had blown a five-point lead over Dortmund, losing two of their last three games.
It was the fourth time in six years that Leverkusen had finished runners-up, a track record of second best that prompted one disgruntled fan to dub Toppmoeller's boys "Neverkusen" on the club's website.
If Germany do lose on Sunday, Calmund will feel the pain just as keenly as the Leverkusen players.
Over the last decade on a tight budget this bear of a man has been one of the driving forces behind Leverkusen's entry into the European football elite.
Calmund feels the pain of defeat more than your average managing director.
He has already suffered three heart attacks and as Leverkusen's Bundesliga campaign disintegrated admitted that he had taken sedatives before one particular league game to calm his nerves.
Even before Leverkusen had completed that hat-trick of failures, Topmoeller had expressed worry about his boss.
"I'm afraid that Calli will break down if we end the season without any silverware.
"He has been through too many problems lately and has put so much work and love into this club that he might arrive at the threshold when he can't carry on any more."